Steam-boiler



(No Model.) 3 Sheets-Sheet 1..

G. P. NILSSO'N. STEAM BOILER.

No. 517,147. Patented Mar 27, 18 94.

(No de 3 sheetsf-sheet 2.

G. F. NILSSON.

STEAM BOILER.

Patented Mar. 27, 1894.

WASHWGTOM. o. o

m: NATIONAL Ln'noGRAFnma coMPANv.

3 Sheena-Sheet 3. G. F.-NILSSON.

STEAM BOILER.

(No Model.)

Patented Mar. 27, 1894.

No. 517,147. jwvh improved steam boiler.

UNITED STATES PATENT OF ICE.

GEORGE F. NILSSON, OF WHIT INSVILLE, MASSACHUSETTS.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 517,147, dated March27, 1894.

ppli n fi July 20, 1891. Serial 110.400.038. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE F. NILSSON, of Whitinsville, in the county ofWorcester, in the State of Massachusetts, have invented certain new anduseful Improvements in Steam- Eoilers, of which the following is aspecifica- The object of the invention is to construct a steam boilerwhich is simpler, cheaper and more effective than the boilers now inordinary use.

The invention consists in certain novel features hereinafter fully setforth and claimed, whereby a maximum amount of steam is obtained fromthe fuel consumed.

Figure 1 represents a front elevation of my Fig. 2 represents a sideelevation thereof. Fig. 3 represents a central vertical section. Fig. 4represents a horizontal section taken on line c-a; in Fig. 3. Fig. 5represents a like view taken on line 'y-y in Fig. 3. Fig. 6 representsan elevation of a radiator connected with this boiler. Fig. 7 representsa vertical transverse section of the radiator taken on line z-z in Fig.6. Fig. 8 represents a side elevation of a radiator in which thecirculation is horizontal. Fig. 9 represents a vertical section thereof.Fig. 10 represents an end elevation of a series of connected radiators.Fig. 11 represents a side elevation of a part of one of the verticalflues of the boiler showing the door in position. Fig. 12 represents afront elevation of the ashpit section provided with two doors.

Like letters and numerals of reference indicate the same parts in allthe figures.

This invention relates especially to steam boilers for steam and hotwater heating pur- 7 meeting ends are riveted together at, g. Thesewalls are joined by miter joints h, as shown in Fig. 4. Below thecorrugated faces, f, each wall is provided with a rectangular chamber,'i, 2", 11 respectively, said chambers having an inwardly projecting lipor flange, j, upon which the grate O rests, as is best shown in Fig. 3.These chambers i, t, and 2' extend around the top of the ash-pit B.

A door, 70, opens through the front wall, m, into the fire box A.Vertical rectangular pipes, 19, are disposed at opposite sides of thedoor, is, and serve to connect the front ends of the chambers 2,41, witha horizontal pipe, q, arranged above the door, is. A Water chamber, as7', having an inwardly inclined wall, as t, is formed below the door,it, and is connected by ducts, as v, with the chambers m, as shown inFig. 5.

The corrugations, f, with the outer Wall, b, form small water spaces f,which open at their lower ends into the water chambers t, t", and t andat their upper ends into a water jacket 21 arranged at the top of thefire box and extending over a portion thereof. This construction is morecompact in form than the separate tubes heretofore in use and can beconstructed more cheaply, the corrugations and the outer facing, b, allbeing made from a single sheet of metal. These corrugations also give animmense heating surface and no water jacket is required on the outsidethereof as is necessary in most corrugated cast-iron casings.

A vertically arranged thin water jacket, as 20, opens into the top ofthe chamber 'b. lhis water jacket 20 forms the back of the boiler and isextended above the fire box. Pipes 43 tap the side chambers i, 'i', anda similar pipe 44 taps the rear chamber 1?. A vertical return pipe 45connects said pipes 43 and 44 as is shown in Figs. 4 and 5.

The water jacket 21 disposed at the top of the fire box unites at itsrear end with a Vertical water jacket 22 which connects at its"- thisarrangement of the water jackets 21, 22 and 23 an open space, as H, isformed above the fire box. This space H is the result of my particulararrangement of jackets and pipes which is a salient feature. Bydirecting the water pipes, as described, vertically and horizontallyforming the open space H I am enabled to direct the flame in a thinsheet over the water pipes for an extended distance, the flame beingdirected against the jackets on both sides and against both sides of thepipes, 26, forming an extended heating surface. The space H may beclosed and form an oven if desired.

The ash-pitB is provided with a door, 20, pivoted centrally on ahorizontal axis, 15, and counterbalanced to swing in an inclined mouth,16. This month 16 is provided with a horizontal lip, 17, in its lowerportion, as best shown in Fig. 3. This door serves to regulate the draftthrough the ash-pit and under the grate. WVhen adjusted in any givenopen position it remains in that position and affords two draftopenings, one above and one under it.

A rectangular pipe, q, is arranged above the fire box door k, and istapped by a series of pipes 25, which incline upwardly toward the rearof the fire box. A series of vertically arranged pipes 26 is connectedwith the inner ends of said pipes 25 and extends upwardly between thewater jackets and 22. One of the pipes is connected bya branch pipe 27with the water jacket 21. The tops of the pipes 26 open into areetangularehamber 28, as is shown in Fig.

Over the forward end of the water jacket 23 arectangular chamber 29 isdisposed which is connected by a pipe 31 with the water jacket 23 and bya horizontally arranged jacket with the chamber 28. The chamber 29 istapped by vertical ports 32 upon which a steam dome K is mounted.

The space between the jackets 20, 22,30 and 23 forms a flue P leadingfrom the fire box, said flue openinginto a chamber 35 from which achimney 36 leads. A hinged door 37 closes the front of the chamber 35and affords space for cleaning the horizontal portion of the flue. Inthe side walls of the flue, P, vertical cleaning openings 40 are formed,said openings being closed by detachable doors 41 held by buttons 12 asshown in Fig. 2.

In Figs. 6 and 7 radiators R are shown, which areconstructed in likemanner as the boiler walls from a single sheet of metal folded uponitself, one face thereof being corrugated at At the ends of thecorrugations transverse pipes 61 connect the supply and discharge 52 and53 from the boiler opening into opposite ends of the lower pipe 51. Thecorrugations may be arranged horizontally and the pipes 51 vertically inthe form shown in Figs. 8 and 9 or the corrugations may be arrangedvertically and the pipes 51 horizontally as shown in Figs. 6 and 7 Theradiators may be arranged in series as in Fig. 10, and the lower pipes51 connected by suitable couplings 54. Constructed in this form theradiators are greatly lessened in size or number and a largely increasedradiating surface afforded by the corrugations.

In the use of my improved boiler the fire passes from the box A acrossthe horizontal bottom thereof up through the vertical portion of theflue P and horizontally again across the top of the boiler makingpractically a length of flue in contact with the water spaces of oversix feet to the stack. Whereas, if the space H, were done away with andthe pipes run vertically up through said space the play of the fire fromthe fire box would only strike about two feet of heating surface.Whereas by drawing the fire back into the rear of the casing thenvertically and horizontally forward I get anextremely large surfacecompared with the size of the boiler even though the space H were wastespace and not utilized as an oven. And again this particular form isextremely compact enabling me to put the boiler into spaces which wouldbe substantially impossible were the same amount of heating surfacedisposed in any other arrangement. The disposition of the chamber 'r'with its inclined wall t, at the frontof the fire box enables the fireto be raked by the ordinary implements.

The cleaning out doors 37 and 41 occupy very little space and therectangular form of the line enables all parts of the heating surface tobe readily reached.

It will be seen that my improved boiler contains a very small amount ofwater in com parison with boilers of common construction only thatamount being employed which is necessary for perfect circulation and theprotection of the surface exposed to the heat. These qualities renderthe boiler economical to run, the outside radiator being greatly reducedand the heating surface enlarged by the peculiar formation of thejackets.

By removing the steam-dome the boiler may be utilized as a hot waterheater, the particular form of radiatordescribed being especiallyapplicable for this purpose.

I claim as my invention- 1. A water chamber consisting of a plain walland a corrugated wall forming a plurality of channels, said walls beingcomposed of a single piece of sheet metal folded upon itself, themeeting edges thereof being overlapped and chambers into which the endsof said channels open.

2. A sectional water jacket for fire boxes, each section comprising aninner and an outer wall both composed of a single'sheet of folded sheetmetal, the meeting ends of which are overlapped and riveted, theinnerwall being corrugated, and the several sections being united at theirends by miter joints, substantially as described.

3. In a steam generator, the combination of a fire box provided with theflue P, a pipe g at the front of the fire box,apipe 28 at the top ofsaid flue, and bent pipes 25 extending through the upper part of thefire box and through said flue and connected with said pipes q and 28.

4. In a steam generator, the combination of a fire box provided with theflue P, a pipe g at the front of the fire box, a pipe 28 at the top ofsaid flue, and bent pipes 25 extending through the upper part of thefire box and through said flue and connected with said pipes q and 28,and Water jackets connected with said pipes.

5. In a boiler the fire box, A, having the corrugated Water jacketforming walls therefor and extended to form the flue P, in coinbinationwith the base pipes 11, e", and 2' and GEORGE F. NILSSON.

Witn esses K. DURFEE, O. M. SHAW.

